Skiving-machine.



ALLATHAM- SKlVlNG MACHINE.

APPLICATION FILED NOV. 6. 1914.

1,21 8,673. Patented Mar. 13, 1917.

" WITNESSES INVENTUR 5 ca. More unm. WASNINGYON. o c

ALBERT LATI-IAM, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATER$ON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

SKIVING-MACHINEQ Patented Mar. 13, 1917.

Application filed'November 6, 1914. Serial No. 870,630.

To all whom it may concern:

Be it known that I, ALBERT LATHAM, a citizen of the United States, reslding at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Skiving-Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to .skiving knives and more particularly to skiving knives having a knife blade formed of a thin sheet of steel bent into a substantially cylindrical shape.

The object of the present invention is to provide an improved form of skiving knife which presents a true cylindrical cutting edge at all times to the Work, and which may be readily adjusted as the cutting edge is ground away.

A further object of the invention is to provide a skiving knife of this type which is compact in form and presents a smooth'unbroken interior to provide for the ejection of chips from the knife.

' With these objects in view the several features of the invention consist in certain novel features of construction, combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art from the accom )an in descri )tion.

In the accompanying drawings illustrating the preferred form of the invention; Figure 1 represents a side elevation partly in section of the improved form of skiving knife Fig. 2 is a front elevation of the knife shown in Fig. 1; Fig. 3 is a detail illustratin a front elevation of the mechanism for adjusting the knife blade; and Fig. 1 is a detail illustrating a side elevation of the blade adjusting ring.

The skiving knife shown in the illustrated embodiment of the invention is of the usual form having a thin steel knife blade bent into a substantially cylindrical form and beveled upon its outer surface to form a cutting edge upon the inner surface of the blade. In the present construction the knife blade is clamped throughout all portions of the periphery to an internal holder having a true cylindrical blade engaging surface, thus causing the cutting edge to run true irrespective of inequalities in the thickness of thefknife blade. The clamping'action upon the knife blade is secured by a simple and compact mechanism which engages with the outside of the knife blade and is contracted to clamp the knife blade rigidly to the sup porting holder. In the illustrated embodiment of the invention a knife holder 1 is rigidly secured to the knife carrying shaft 3 through a plurality of threaded fasteners I which connect the holder directly with a flange 5 formed upon the end of the knife shaft. The knife holderis provided with a true cylindrical blade engaging surface 6 which mayv be formed after the holder has been secured to the shaft 3, and a. smooth unbroken interior surface which provides for the convenient ejecting of chips removed by the knife blade. A cylindrical knife blade 10 is supported exteriorly of the holder and is clamped to the holder by a tapered clamping ring 11 which is connected to a base ring 12 secured to the holder 1 by fastenings 13. It will be noted from an inspection of Figs. 1 and 8 of the drawings that the clamping ring 11 is formed of thin sheet metal bent to the desired shape and having depressed portions 14 which engage with corresponding recesses formed in the periphas shown clearly in Fig. 1, which is retained in place by an annular shoulder formed upon the inner surface which engages with a retaining member 18 secured tow the knife holder by the fastenings 13. .As the rotary ring 17 is retained against axial movement its rotation causes an axial movement of the member 16 to either contract the clamping ring or allow it to expand and release the knife blade. A rotation of the ring 17 rela tive to the holder is conveniently secured by forming a plurality of openings'20 in the ring which may be engaged by an operating.

tool to impart a relative rotation-to the ring and actuating member 16.

It is desirable to provide mechanism for conveniently usting the knife blade as the cutting edge is ground away and to this end the knife blade is connected to an adjusting ring 22 in the usual manner through a plurality of projections indicated at 23. The adjusting ring is moved axially by a rotary adjusting member 242 which is journaled in a recess formed on the outer surface of the knife holder and is provided with a spiral traversing groove 25 which causes an axial movement'of the adjusting ring and knife blade on a rotation of the adjusting member. The inner face of the adjusting member 24 is provided with gear teeth 27 which are engaged by a pinion 28 mounted upon a stud 29 which is journaled in the holder 1 and ring 12 and is provided with a squared end 30 for the reception of an operating tool. The member 22 is operatively connected with the adjusting ring 24 by a pin 82 which. passes through the ring and has its inner end received in the groove 25. The outer end of the pin 32 passes through the knife blade 10 and through a slot formed in the clamping ring 11 to lock them against a relative rotation. The clamping ring 11 is also looked to the outer ring 16 and the base ring 12 by a pin 35 which is received in a radial.

slot formed in the base ring and passes through slots formed in the rings 11 and 16. With, this construction the knife blade and the several parts for supporting and clamping it in operative position are all looked against rotation relative to the supporting shaft but a relative longitudinal movement of the several parts is permitted.

While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention. 7

The invention having been described, what is claimed is:

1. A skiving knife, having in combina tion, a knife blade holder, an annular knife blade supported by the holder, means for adjusting the knife blade axially of the holder, a clamping ring engaging with the outside. of the knife blade, an actuating member engaging with the ring, and means for moving the actuating member axially of the knife to contract the ring and clamp the knife blade to the holder.

2. A skiving knife, having in combination, a knife blade holder, a knife blade sup ported upon the outside of the holder, means for adjusting the knife blade axially of the holder, an external tapered clamping ring, and mechanism cooperating with the ta pered portion of the ring for contracting the ring upon the knife blade.

3. A skiving knife, having in combination, a knife blade holder, a cylindrical knife blade supported externally of the holder, an adjusting ring, a rotary member interposed between the adjusting ring and the holder, mechanism for rotating the member to cause an axial movement of the ad-, justing ring and means for clamping the knife blade to the holder.

A skiving knife, having in combination, a knife bladeholder, having an. annular recess formed upon the outside, a knife blade supported upon the holder, an justing ringlocated in the recess and connected to the knife blade, mechanism supported by the holder to cause an axial move- .ment of the adjusting ring, an external clamping ring, and means for contracting the clamping ring upon the knife blade.

5. A skiving knife, having in combination, a knife blade holder, a knife blade supported upon the holder, means for clamping the knife blade to the holder, an. adjusting ring connected to the knife blade, a rotary member interposed between the adjusting ring and holder, and an adjusting pinion journaled upon the knife holder and operatively connected with the rotary member.

6. A skiving knife, having in combination, a knife shaft, a knife blade holder rigidly secured to the shaft,-and having a true cylindrical blade engaging surface, a knife blade supported exteriorly upon the holder, mechanism for adjusting the blade axially of the holder, an external tapered clamping ring, and means for contracting the ring to clamp the knife blade to the holder.

7. A skiving knife, having in combination, a knife blade holder, a knife blade supported thereon, an adjusting ring connected to the knife blade, a rotary adjusting member interposed between the ring and the knife blade holder, an external clamping ring, mechanism for locking the adjusting ring and clamping ring against rotation relative to one another, and means for rotating the adjusting member.

8. A skiving knife, having in combination, a knife blade holder, a knife blade supported thereon, a tapered clamping ring surrounding the knife blade, an exterior clamping member surrounding the ring, mechanism for locking the ring and member against relative rotation, and an annular rotary ring threadedly connected with the exterior clamping member to impart an axial movement to the clamping member and contract the clamping ring.

9. A skiving knife, having in combination, aninternal knife blade holder having an annular recess, a knife blade supported upon the holder, an adjusting ring connected to the knife blade, a rotary member interposed between the adjusting ring and knife blade holder and having a spiral groove formed therein, connections between the rotary member and adjusting ring, and mechanism for rotating the ring.

10. A skiving knife, having in combina tion, a knife shaft, a knife blade holder rigidly secured thereto having a substantially unbroken smooth tapered interior surface and a true cylindrical blade engaging surface, a knife blade supported exteriorly of the holder, an external tapered clamping ring surrounding the knife blade, means cooperating with the tapered portion of the ring for contracting the ring to clamp theknife blade to the holder, and means for adjusting the blade relative to the holder.

11. A skiving knife having in combination, an internal knife blade holder, an annular knife blade supported exteriorly of the holder, means for adjusting the knife blade axially of the holder, a tapered annular clamping ring surrounding the knife Copies of this patent may be obtained for blade, a second ring surrounding the clamping ring, and mechanism for moving the second ring axially of the knife to contract the clamping ring and clamp the knife blade to the holder.

12. A skiving knife, having in combination, an internal knife blade holder, an annular knife blade supported upon the holder, means for clamping the knife blade to the holder, an adjusting ring connected to the knife blade, a pinion journaled in the knife holder and having a stem shaped to receive a suitable adjusting instrumentality, and connections between the pinion and adjusting ring to cause axial movements of the adjusting ring upon rotation of the pinion.

ALBERT LATHAM.

Witnesses:

LONA A. MILLER, CHESTER E. ROGERS,

five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

